Darkknell was first canonically mentioned in the StarWars.com article "Where in the Galaxy Are the Worlds of Star Wars: The Force Awakens?," which was written by Mark Newbold and published on January 29, 2016. In the Star Wars Legends continuity, the planet Darkknell first appeared in the novella Interlude at Darkknell by Timothy Zahn and Michael A. Stackpole, which was published in the 1999 anthology Tales from the New Republic.
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